LHeC Detector Update - indico.cern.ch · P.Kostka 13th,Octoberl,2010,,LHeC,Design,Meeting Solenoid...
Transcript of LHeC Detector Update - indico.cern.ch · P.Kostka 13th,Octoberl,2010,,LHeC,Design,Meeting Solenoid...
P.Kostka 13th Octoberl 2010, LHeC Design Meeting
LHeC Detector Update• Second Proton Beam
-‐ steering through IR in same beam pipe √(informal meeting on 5.October ’10)
• Beam Separation Dipols -‐ integrated in detector structure -‐ where?
• SR Calculations-‐ not finished
• Beam Pipe / Detector Dimensions-‐ not fixed
• Forward Jet Measurement -‐ Toroid -‐ an option?
• Solenoid(s)-‐ 1 or 2 magnets (2 magnets -‐ no return yoke)?-‐ physics case: best muon measurement possible-‐ cost estimate needed-‐ any drawbacks?
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detector integrated dipole
SCsolenoid
coil
SC coilsplitand
tilted
B
BStephan Russenschuck, Simona Bettoni, Eugenio Paoloni
IP
Rogelio Tomas, Frank Zimmermann
Special LHeC Mee@ng
4 October 2010
Beam Separation Dipols
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P.Kostka 13th Octoberl 2010, LHeC Design Meeting
Solenoid
Tracker
ECAL
HCAL
Beam Pipe
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P.Kostka 13th Octoberl 2010, LHeC Design Meeting
Solenoid
Tracker
ECAL
HCAL
Beam Pipe
RR-option - short dipoles - dipole near to beam pipe -
transparent?- between tracker + calorimeter
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P.Kostka 13th Octoberl 2010, LHeC Design Meeting
But 2 x 9m dipole for the LR option? -> shorter separate functionality
Solenoid
Tracker
ECAL
HCAL
Beam Pipe
RR-option - short dipoles - dipole near to beam pipe -
transparent?- between tracker + calorimeter
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P.Kostka 13th Octoberl 2010, LHeC Design Meeting
Answer: SR problematic - to be checked
IR layout w. head-‐on collision
Beam envelopes of 10 (electrons) [solid blue] or 11 (protons) [solid green], the same envelopes with an additional constant margin of 10 mm [dashed], the synchrotron-radiation fan [orange], and the approximate location of the magnet coil between incoming protons and outgoing electron beam [black]
detector integrated dipole: field ~0.45 Tcritical photon energy ~ 1 MeV
average SR power = 87 kW8x1010 / bunch passage
CLIC-‐LHeC Synergies & KEK Trip Report, Frank Zimmermann, CLIC Mee@ng 20 August 2010
LR - DesignM.Sullivan -
Elliptical Beam Pipe1:inner-∅x = 12cminner-∅y = 5cm
outer-∅x = 12.8cmouter-∅y = 5.8cm
➟ thickness: 0.4cm
INTERACTION-‐REGION DESIGN OPTIONS FOR A LINAC-‐RING LHEC by F.Zimmermann et.al. submitted IPAC'10
Beam envelopes of 10σ (electrons) [solid blue] or 11σ (protons) [solid green],
the same envelopes with an additional constant margin of 10 mm [dashed],
the synchrotron radiation fan [orange], and the approximate location of
the magnet coil between incoming protons and outgoing electron beam [black].
SR Calculations
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P.Kostka 13th Octoberl 2010, LHeC Design Meeting 5
SR CalculationsCurrent Activities
• RR Option:
• Nathan Bernard (UCLA) -‐ MadLab/GEANT4 Rob Appleby (Uni Manch.) -‐ dedicated software -‐ fields (Velocity Verlet meth.) + (MC LEP inspired -‐ H.Burkhardt)
• LR Option:
• Emre Eroglu (Uludag Uni. -‐ Fluka)
• First Results (RR) presented in August (N.B.)
• Essential: check of LR Option
• Incorporate the upstream sources (not starting from last p-‐quadrupole)
P.Kostka 13th Octoberl 2010, LHeC Design Meeting
Characteris@c Detector Dipole No Detector Dipole
E [GeV] 60 60
I [mA] 100 100
Detector Dipole Length [m] 2.4 0
B [T] 0.024 0.028
θIni@al* [mrad] 3.6 3.8
θCrossing* [mrad] 1.108 1.104
Ec [keV] 102.79 108.05
Eμ [keV] 31.65 33.27
Eσ [keV] 57.47 60.41
λ [m] 2.585 2.579
γ/e-‐ 7.7025 8.2043
P [kW] 24.3756 27.2986
Separa@on** [mm] 49.067 49.795
SR Characteris@cs using GEANT4 Simula@ons
*θ is the angle between the electron and proton momentum vectors** The separa@on is the displacement between the proton and electron centroids at the absorber
Synchrotron Radia@on Results -‐ Using GEANT4, Nathan Bernard, LHeC Design Mee@ng, 31-‐8-‐10 *based on the op@cs of L.Thompson 6
P.Kostka 13th Octoberl 2010, LHeC Design Meeting
2 mm
4 mm
6 mm
8 mm
Beam Pipe Thickness
Be [X0=347mm]
13
0.8 mm
10
0.6 mm
7
0.4 mm
16
1 mm
Rad
iatio
n Le
ngth
X0 fo
r Θ=1
0 Tr
acks
-Ber
ylliu
m [%
]
7
Beam Pipe Wall Thickness
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Detector Setup
Main Objectives 1• Warm Calorimeter (contr. Uludag Univ.)
• Cold Calorimeter (H.Oberlack)
• dedicated forward calorimeter (Calice, DREAM)
• Tracking -‐ lightweight -‐ SiGas (pixel, strip, pad)Trigger capableTRD in front of backward calorimeter (γ/π0/e)track segment definition (NikHEF)
• Tracking conventional -‐ Si based (pixel, strip, pad)multiple scattering! few high accurate measuring points only -‐ high costs
P.Kostka 13th Octoberl 2010, LHeC Design Meeting
Strong Focussing Magnet System (dark blue)inner R = 8. cm; outer R = 15 cm (guess)ΔZ = 160. cm -- t.b.defined
High Q2 - Active Detector Parts
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P.Kostka 13th Octoberl 2010, LHeC Design Meeting
Fwd Tracker - active Thickness 8. cm eachSi-Pix/Si-Strip/SiGas Tracker:inner R = 4.86 cm; outer R = 61.3 cmPlanes 1 - 5: z1-5 = 140. / 210. / 280. / 340. / 370. cm
Elliptical Pixel Tracker:inner-∅x = 9.32cminner-∅y = 7.82cm
2.4cm active radius
Barrel Tracker - active Radius 2.5cm eachSi-Pix/Si-Strip/SiGas Tracker:1. layer: inner R = 8.8 cm; outer R = 11.3 cm2. layer: = 21.3 cm; = 23.8 cm3. layer: = 33.8 cm; = 36.3 cm4. layer: = 46.3 cm; = 48.8 cm5. layer: = 58.8 cm; = 61.3 cm
4 Cone structured fwd/bwd Si-pix/Si-strip/Si-gas TrackerR min = 4.86 cm2.5cm active thickness
Bwd Tracker - active Thickness 8. cm eachSi-Pix/Si-Strip/SiGas Tracker:inner R = 4.86 cm; outer R = 61.3 cmPlanes 1 - 5: z1-5 = -140. /-210. /-280. /-340. /-370. cm
Low Q2 - Active Detector Parts 1
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P.Kostka 13th Octoberl 2010, LHeC Design Meeting
Fwd Tracker - active Thickness 8. cm eachSi-Pix/Si-Strip/SiGas Tracker:inner R = 4.86 cm; outer R = 61.3 cmPlanes 1 - 5: z1-5 = 140. / 210. / 280. / 340. / 370. cm
Barrel Tracker - active Radius 2.5cm eachSi-Pix/Si-Strip/SiGas Tracker:1. layer: inner R = 8.8 cm; outer R = 11.3 cm2. layer: = 21.3 cm; = 23.8 cm3. layer: = 33.8 cm; = 36.3 cm4. layer: = 46.3 cm; = 48.8 cm5. layer: = 58.8 cm; = 61.3 cm
4 Cone structured fwd/bwd Si-pix/Si-strip/Si-gas TrackerR min = 4.86 cm2.5cm active thickness
Bwd Tracker - active Thickness 8. cm eachSi-Pix/Si-Strip/SiGas Tracker:inner R = 4.86 cm; outer R = 61.3 cmPlanes 1 - 5: z1-5 = -140. /-210. /-280. /-340. /-370. cm
Toroid 1-2 Teslainner R = 20 cm; outer R = 62cm; ∆z = 120cmBetter low angle jet measurement - option to be checked (transparent enough?)
Fwd Tracker - active Thickness 8. cmSi-Pix/Si-Strip/SiGas Tracker:inner R = 20 cm; outer R = 62 cm
Low Q2 - Active Detector Parts 2
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Elliptical Pixel Tracker:inner-∅x = 9.32cminner-∅y = 7.82cm
2.4cm active radius
P.Kostka 13th Octoberl 2010, LHeC Design Meeting
Fwd-Toroid z-Dimension = PathLengthMomentum - Field Strength
g
0.8 m
1.0 m
1.2 m
1.6 m2.0 m
0.8 m
1.0 m1.2 m
1.6 m
2.0 m
Field = 1T Field = 2T
g g
g
PathLength = 1.2 m used in figure before
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P.Kostka 13th Octoberl 2010, LHeC Design Meeting ILC - 4th Proposal 13
CMS Detector Setup
P.Kostka 13th Octoberl 2010, LHeC Design Meeting
Low Q2 - Active Detector Parts 3
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ILC - 4th Proposal
[cm]
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Detector Setup
Main Objectives 2• Solenoid return yoke for 3.5T -‐ needs ~10k tons steel
~3M$ (June ’10) -‐ ~5M$ (currently) + cost for extended muon tracking detector, mechanics etc.
• Second solenoid -‐ closed field; either lower field both -‐ adding to 3.5T; Or higher field in inner part = 3.5T + outer field
• CMS and ATLAS are not hermetic as well;radiation to be checked (Uludag Univ.)
• access easier and weight much less;support structure by both solenoids + external frame
• to be evaluated (H.Tenkate, A.Dudarev)
• ONE Detector Configuration Onlywould be a big step forward!
ILC - 4th Proposal
P.Kostka 13th Octoberl 2010, LHeC Design Meeting 15
Detector Setup
Main Objectives 2• Solenoid return yoke for 3.5T -‐ needs ~10k tons steel
~3M$ (June ’10) -‐ ~5M$ (currently) + cost for extended muon tracking detector, mechanics etc.
• Second solenoid -‐ closed field; either lower field both -‐ adding to 3.5T; Or higher field in inner part = 3.5T + outer field
• CMS and ATLAS are not hermetic as well;radiation to be checked (Uludag Univ.)
• access easier and weight much less;support structure by both solenoids + external frame
• to be evaluated (H.Tenkate, A.Dudarev)
• ONE Detector Configuration Onlywould be a big step forward!
P.Kostka 13th Octoberl 2010, LHeC Design Meeting
many things to do still
P.Kostka 13th Octoberl 2010, LHeC Design Meeting
CLIC-LHeC Synergies & KEK Trip Report, Frank Zimmermann, CLIC Meeting 20 August 2010